Practice Quiz in Wire and Wireless Communications System Part 57

(Last Updated On: December 21, 2017)

Quiz in Wire and Wireless Communications System

This is the Online Practice Quiz in Wire and Wireless Communications System Part 57 as one of the Communications Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Examination Questions in Electronic System and Technologies, Communications Books, Journals and other Communications References.

Continue Part LVII of the Online Practice Quiz

Quiz in Wire and Wireless Communications System

Question 561. To what is the output of a scanner fed in fax?

A. transmitter

B. receiver

C. mixer

D. oscillator


Question 562. A condition of a telephone handset, in which it can be called, is _______ condition.

A. On-hook

B. Off-hook

C. Busy

D. None of these


Question 563. The Strowger or step-by-step system falls under what type of switching control system?

A. Manual

B. Progressive

C. Common

D. Automatic


Question 564. A method of handling lost calls wherein a call failing to immediately find a server, waits enters a queue until one becomes available.

A. Lost Calls Cleared

B. Lost Calls Held

C. Lost Calls Delayed

D. None of these


Question 565. An electronic circuit which is inserted into the 4-wire trunk path effectively to block the passage of reflected signal energy

A. Echo suppressor

B. Echo suppressor

C. Loop extender

D. Telephone amplifier


Question 566. A method of multiplexing in which the total frequency spectrum available is used by each channel, but not part of the time.

A. FDM

B. TDM

C. SDM

D. GSM


Question 567. CCITT recommendation E-161 recommends that not more than ________ digits make up an international number, excluding the international prefix.

A. 10

B. 12

C. 16

D. 20


Question 568. Type of Class 4 toll center which provides human operators for both outward and inward calling service.

A. Class 4P

B. Class 5

C. Class 4C

D. Class 1


Question 569. In telephony, tone dialing takes ________ time than pulse dialing.

A. Less

B. More

C. About the same

D. Can’t be determined


Question 570. What should bring the left margin of the map to the left side of the paper in the recorder of facsimile?

A. map signals

B. phasing signals

C. automatic switch

D. 90 Hz

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